6638501459 has 2 divisors, whose sum is σ = 6638501460. Its totient is φ = 6638501458.

The previous prime is 6638501453. The next prime is 6638501497. The reversal of 6638501459 is 9541058366.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6638501459 - 2¹² = 6638497363 is a prime.

It is a super-2 number, since 2×6638501459² = 88139403242290257362, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6638501453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3319250729 + 3319250730.

It is an arithmetic number, because the mean of its divisors is an integer number (3319250730).

Almost surely, 2^6638501459 is an apocalyptic number.

6638501459 is a deficient number, since it is larger than the sum of its proper divisors (1).

6638501459 is an equidigital number, since it uses as much as digits as its factorization.

6638501459 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 777600, while the sum is 47.

The square root of 6638501459 is about 81476.9995704309. Note that the first 3 decimals coincide. The cubic root of 6638501459 is about 1879.4178689389.

The spelling of 6638501459 in words is "six billion, six hundred thirty-eight million, five hundred one thousand, four hundred fifty-nine".